Fig. 1

OGTT-based glucose and insulin concentrations before and after treatment in PCOS patients with T2DM. a, b Glucose and insulin concentrations based on the OGTT in the saxagliptin group. c, d Glucose and insulin concentrations based on the OGTT in the saxagliptin + metformin group. e, f Glucose and insulin concentrations based on the OGTT in the metformin group. Data are presented as mean ± SEM. The AUC glucose and AUC insulin are shown in each figure. The P-values are based on the Wilcoxon signed-rank test for differences between groups. *P < 0.05; **P < 0.01. OGTT: oral glucose tolerance test; PCOS: polycystic ovary syndrome; T2DM: type 2 diabetes mellitus